Meta-dot question

Hi,

I'm having trouble figuring out how to ensure that when I load or
compile a function, the location of the source is recorded, so that I
can use "meta-dot" on a function name (or go through the IDE) to get
to its definition.  I'm working with systems other people have
written, and for some systems the information is there, but sometimes
it isn't---even for the code *I* write.  Is there a variable I need to
set, or declarations I should make?

Thanks for any advice,
Rob St. Amant
-- 
Rob St. Amant
http://www4.ncsu.edu/~stamant